Rubber stamp hammerhead



FIG. 1 is a front elevational view of a rubber stamp hammerhead showing my new design;

FIG. 2 is a side elevational view thereof;

FIG. 3 is a rear elevational view thereof; and

FIG. 4 is a sectional view taken along line 4--4 of FIG. 3. 

The ornamental design for a rubber stamp hammerhead, as shown. 